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发明名称
bidirectional e-Learning System and method thereof
摘要
申请公布号
KR101001279(B1)
申请公布日期
2010.12.14
申请号
KR20080075138
申请日期
2008.07.31
申请人
发明人
分类号
G06Q50/20;G06Q50/10
主分类号
G06Q50/20
代理机构
代理人
主权项
地址
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